Bolt anchor



Nov. 29, 1927.

R. E. OGDEN ET AL BoLT ANCHOR Filed Nov. 24. 1922 2 Sheets-Sheet l BY%62 5. C, 731/?0700/1 ZWWM A TTORNE Y Nov. 29, 1927. I 1,650,958

R. E. OGDEN ET AL BOLT ANCHOR Filed Nov. 24, 1922 2 Sheets-Sheet 2 IINVENTOR Fad 272E Qgdqn y I C /as. 6. 7077257050,

ZWM

A TTORNE Y Patented Nov. 29, 192.7.

BNWALL, NEW YORK, AND CHARLES C."TOMKI1\TSON,

Y, ASSIG-NORS TO JOHN EDWARD OGDEN,

RALPH EDWARD OGDEN, OF CO 015 PLAINFIELD, NEW JEBSE TAINVILLE, NEW YORK.

Application filed November 24, 1922.

TEs PATENT OFFICE.

O]? MOUN- BOL'I ANCHOR.

This invention relates to improvements in bolt anchors oi the characteremployed for obtaining anchorage in walls of brick or stone orcementitious material not adapted to directly receive a threaded bolt.

element or One of the objects of the invention is to provide a shieldthat may beset deep in the wall and need not extend to the outer end ofthe opening in the wall in order to be properly and firmly anchoredAnother object of vide an expansion shield, having therein.

the invention is to proa plurality of exactly similar sections, wherebythe manufacturing cost of the shield is a minimum.

reduced to Another object of the invention is to provide an expansionshield and expanding nut therefor so relatively constructed and arranged that after expansion the bolt anchored thereby loosening orremoving can be removed without the shield and nut.

Further objects of the invention will appear from the followingspecification taken in connection with the drawings, which form a partof this application, and

view of a bolt Fig. 1 is an elevational in which anchor constructed inaccordance with the invent-ion.

- Fig. 2 is an elevational view taken at right angles to Fig. 1.

Fi 3 is an end elevation of the inner D end of the shield and nut shownin Fig. 1.

Fig. 4; is a transverse sectional elevation taken substantially on line4-4 of Fig. 1.

Fig. 5 is a transverse sectional elevation taken substantially on line55 of Fig. 6 is a longitudinal sectional elevation taken substantiallyFig. 3.

Fig. 7 is a longitudinal on line 6-6 of sectional elevation takensubstantially on line 77 ol Fig.

1, showingthe shield in Fig. 8

expanded position. is a longitudinal sectional elevation simllar to Fig.6 taken at an angle to Fig. 7 and showing the shield in expandedposition.

Fig. 9 is an elevational View of one former nut that may be used forexpanding the figures.

shield shown in the preceding Figs. 10 and 11 are end elevations of thetwo ends of the nut shown in Fig. 12 is an elevational view Fig. 9.

of the nut Serial No. 602,941.

shown in Figs. 9, 10 and 11, looking in the direction of the arrow 12 inFig. 11.

Fig. 13 is an elevational view of another form of nut that may be usedin conjunction with the shield shown in Figs. 1 to 8.

Figs. 14.- and 15 are'end elevations of the two ends of thenut showninFig. 13.

Fig. 16 is an elevational view of the nut shown in Figs. 13, 14 and 15,looking in the direction of the arrow 16 in Fig. 15.

Fig. 17 is an elevational view of another form of nut.

Figs. 18 and 19 are end elevations of the two ends of the nut shown inFig. 17, and

Fig. 20 is an elevational view of the nut shown in Figs. 17, 18 and 19,looking in the direction of the arrow 20 in Fig. 19.

The invention briefly described comprises an expansion shield formedfrom a plurality of exactly similar sections, each section having meansadapted to overlap the adjacent section, whereby the sections areretained against separation.

In the particular embodiment of the invention shown, the shieldcomprises a pair of sections, each section having tabs formed thereon,adapted to overlap the other section. These tabs in combination with thenut, which is positioned in the shield for expanding the shield, securethe sections together. The shield also has a plurality of taperedlongitudinally extending fingers, having their ends inturned andoverlapping the end of. the nut, whereby the nut is retained within theshield.

The nut in the lustrated has with respect to a plane at right angles toits axis, fiat perpendicular and fiat inclined faces hereinafterreferred to respec tively as prismatic and pyramidal faces. These facesalternatearound the exterior of the nut. When the nut is mounted in theshield, the prismatic faces are disposed within thelongitudinallyextending fingers and 'the tapered or pyramidal faces are disposedformsot the invention ilposite directions at Each section is preferablyformed of sheet metal of uniform thickness and has formed thereon a pairof tabs. Each section also has formed in "its outer surface a pair ofannular depressions 32 and 33, these depressions being spacedlongitudinally of the sections and the depressions on the respectivesections registering when the sections are secured together.

The tabs formed on each section are spaced longitudinally thereon andextend in opdiametrically opposite points when the sections areassembled. These tabs are adapted to seat in the depressions 32 and 33and in conjunction with the nut 34 retain the sections againstseparation.

Looking at Fig. 1, the tabs 35 and 36 are formed on section 31 andextend in opposite directions and seat in the depressed portions 33and32 respectively of the section 30. In Fig. 5, the tab 36 is alsoillustrated and in this figure is shown a tab 37 formed on the section30. The other tab 38 formed on the section 30 is shown in Fig. l.

From this descriptionit will be seen that the two sections are exactlysimilar and may be used interchangeably and may be formed from the samedies, thereby minimizing the cost of manufacture.

The shield or the shield sections have formedthereon at their inner endslongitudinally extending, tapered fingers 40, the ends 41 of the fingersbeing inturned and as shown in Fig. 3 overlapping the end of the nut 34,thereby retaining the nut in the shield.

From the showing in the drawings, it will be seen that the shield issubstantially cylindrical and prior to expansion the fingers aredisposed in the cylindrical outersurface of the shield.

The nut 34 in the particular forms of the invention shown has acomposite of prismatic and pyramidal surfaces. These surfaces or facesalternate and in Figs. 1 to 8 inclusive the prismatic faces 42 aredisposed within the fingers 40. In this form of the invention fourprismatic faces are shown and four pyramidal faces 43 are disposedrespectively between the tapered fingers 40.

As the bolt 44 is threaded into the nut, the

nut will travel lengthwise thereon after the.

head 45 of the bolt encounters opposition such as that formed when thehead engages and forces an object 46 against the wall in which theanchor is inserted. As the nut travels along the bolt, the portions ofthe shield engaged by the nut will be forced outwardly, thereby securelyanchoring the shield in the opening or bore in the wall in which it isinserted.

The fingers 40 during this operation will be drawnin as. shown in Figs.7 and 8, there bysecurely retaining the nut against. endwisedisplacement and, therefore, after the shield has been expanded andanchored the bolt 44 may be withdrawn if desired. This is due to thefact that the flat sides of the nut are drawn under pressure along theinner surfaces of the fingers 40. The depression 32 in the outer surfaceforms an internal shoulder 47 which in turn forms a stop for limitingthe longitudinal movement of the nut in the shield.

In Figs. 10 to 20 inclusive are shown other forms of nuts which may beused in the place of the nut shown in Figs. 1 to 8.

In Figs. 9 to 12, for instance, four prismatic faces 50 and fourpyramidal faces 51 are shown.

In Figs. matic and faces.

In Figs. 17 to 20 inclusive six prismatic and six pyramidal faces areshown.

It will be obvious that other combinations of prisms and pyramids maybe' made to form a composite of the two types.

Although certain specific embodiments of the invention have beenparticularly-shown and described, it will be evident that the inventionis capable of further modification and that further changes in theconstruction and arrangement of the cooperating parts may be'madewithout departing from the spirit or scope of the invention as expressedin thefollowing claims.

W hat we claim is: 1. An expansion shield comprising a tubular memberformed by a plurality of sections of uniform thickness, having taperedfingers with inturned ends, a nut embraced by said fingers andprojecting therebetween, said nut having fiat prismatic surfacesdisposed with- 1-3 to is inclusive both the prispyramidal portions havethree n said fingers and having fiat tapered surfaces disposed betweenthe fingers.

2. An expansion shield comprising a pair of exactly similar sections,eachseotionhaving a plurality of tabs spaced longitudinally thereof andoverlapping the other section,

said shield having a plurality of longitudinally extending, taperedfingers, and a nut embraced by said fingers.

3.111 combination, a shield having its outer surface substantiallycylindrical and having a plurality of longitudinally extending fingers.and a nutembraced by said fingers having prismatic and pyamidalsurfaces.

4. In combination, a shield, having its outer surfacesubstantiallycylindrical and having a plurality of longitudinally extending' fingers and a fingers having prismatic surfaces disposed adjacentthe fingers and pyramidal surfaces between the fingers.

5. In combination, an expansion shield comprising a tubular memberhaving longi tudinally extending, tapered fingers at one end thereof,and a nut adapted to expand of the shield sections nut embraced by saidall the shield having prismatic surfaces and pyramidal surfaces.

6. In combination, an expansion shield having a plurality oflongitudinally extending tapered fingers and a nut initially embraced bysaid shield and having flat sur faces engaging the inner surfaces ofsaid fingers and tapered surfaces between the fingers, the nut andshield being. so relatively constructed and arranged that the nut willbe retained against endwise and rotational movement when the shield hasbeen expanded thereby.

7. In combination, an expansion shield having a plurality of tapered,longitudinally extendingfingers, and a nut initially disposed within andembraced by the shield and having tapered surfaces extending betweensaid fingers, said nut and shield being so relatively constructed andarranged that the nut will be retained against endwise and rotationalmovement in the shield by of the nut and shield,

interengaging parts after the shield has nut.

8. In combination, an expansion shield having a plurality of tapered,longitudinally extending fingers curved in cross section, and a nutinitially disposed within and embraced by the shield and having taperedsurfaces extending between said fingers, said nut and shield being sorelatively constructed and arranged that the nut will be retainedagainst endwise and rotational movement in the shield by interengagingparts of the nut and shield, after the shield has been expanded by thenut.

9. In combination, an expansion shield comprising a pair of sections,each section having a plurality of tabs spaced longitudinally thereofand overlapping the other section, the tabs located in one planetransverse to the shield extending circumferentially in one directionand the tabs located in another transverse plane extendingcircumferentially in the opposite direction, said shield sections havinglongitudinally extending fingers and a nut disposed in said shield andhaving flat sides engaged by said fingers.

10. In combination, an expansion shield been expanded by the having anannular depression intermediate its ends forming an internal shoulder,means carried by the shield and seated in the depressed portion to formexcess metal therein, and a nut in said shield having a beveledferentially thereof end engageable with the ridge whereby the ridgeforms a stop for limiting the movement of the nut in the shield.

11. An expansion shield formed of sheet metal of uniform thickness andcomprising a tubular member having longitudinally extending,transversely tapered fingers and a nut in said member initially embracedthereby and having tapered flat faces engaged by the inner surfaces ofsaid fingers.

12. An expansion shield comprising a pair of sections, each sectionhaving a plurality of tabs spaced longitudinally and circumandoverlapping the other section, the tabs-located in one plane transverseto the shield extending circumferentially in one direction and the tabslocated in another plane transverse to the shield extendingcircumferentially in the opposite direction, and means within the shieldcoacting with said tabs to retain the sections together.

18. An expansion shield comprising a pair of exactl similar sections,each section having a p uralit-y of tabs spaced longitudinally andcircumferentially thereof and overlapping the other section, the tabslocated in one plane transverse to the shield extendingcircumferentially in one direction and the tabs located in another planetransverse to the shield extending circumferentially in the oppositedirection, and means within the shield coacting with said tabs tomaintain the sections in parallelism so that the tabs retain thesections together.

14:. An expansion shield comprising a pair of sections, each sectionhaving a plurality of tabs spaced longitudinally and circumferentiallythereof and overlapping the other section, the tabs located in one planetransverse to the shield extending circumferentially in one directionand the tabs located in another plane transverse to the shield extendingcircumferentially in the opposite direction, and a nut within the shieldengaging the inner surface of both sections 'coacting with said tabs toretain the sections together. 1

In witness whereof, I have hereunto set my hand this 21st day ofNovember, 1922. RALPH ED'WARD OGDEN.

In witness whereof, I have hereunto set my hand this 21st day ofNovember, 1922. CHARLES C. TOMKINSON.

